Sliding-catch lock.



P. NITZSGHE.

SLIDING CATCH LOGK.

APPLICATION FILED 16110.15, 1910.

Fi g 1 2 sums-gum 1.

awk/WWW Patented Aug. 22, 1911.

P. NITZSGHE.

SLIDING CATCH LOCK.

APPLICATION FILED DEO.15, 1910.

2 SHEETS-$111331 2.

Patented Aug. 22, 1911.

PAUL NITZSCI-IE, OF BANT, GERMANY.

SLIDING-CATCH LOCK. QT

Specification of Letters Patent.

Patented Aug. 22, 1911.

Application filed December 15, 1910. Serial No.'597,483.

To all whom it may concern:

Be it known that I, PAUL NITZSCHE, master locksmith, a subject of theGerman Emperor, residing at No. 23 Mitscherlich street, town of Bant,Germany, in the Grand Dukedom of Oldenburg, have invented certain newand useful Improvements in Sliding- Catch Locks, of which the followingis a specification, reference being had therein to the accompanyingdrawings.

The invention relatesto a sliding-catch lock with means for fixing thecatch and the operating nut or pinion, and consists in the arrangementin connection with the catch bolt of a turning bolt which is partiallycut away and prevents the catch-bolt from moving backward when adjustedin a certain position, and can only be turned from outside by means of aparticular key. The catch bolt is thus secured by means of the turningbolt. A second means of securing the turning bolt is arranged, as theoperating lever can also be fixed in the locking position by means of ascrew.

Figure 1 of the drawing is a central vertical section of the newsliding-catch lock in the open position. Fig. 2 is a view of the lookfrom above in the locking position. Fig. 3 is a central vertical sectionof the lock in the locking position. Fig. 4 is a front elevation of thelock-plate situated on the outside of the door. Fig. 48 is a centrallongitudinal section thereof. Fig. 4 is a back view of the same plate.Figs. 5 and 5 are respectively a front elevation and a side elevation ofa fixing or adjusting device fixed in the look by means of a screw.Figs. 6 and 6 illustrate a liner plate of the lock. In Figs. 7 and 7 thelocking lever arranged on the inside of the door is shown respectivelyin front elevation and in side elevation. Figs. 8 and 8 illustrate thelock plate situated on the inside of the door in front elevation andside elevation respectively. Figs. 9, 9 9 and 9 are respectively a frontelevation, a side elevation and two end views of the locking boltbelonging to the lock. Figs. 10, 10 and 10 illustrate in front elevationand side elevation, an example of a key suited to the lock. I

In the example of theinvention illustrated in the drawing a is thecatch-bolt Z) a pin thereon, which when in the locking position (Fig.3,) prevents the catch bolt 4; from moving below the turning bolt 0arranged above, but when in the open position (Fig. 1) allows the catchbolt to move back and forth. For this purpose the turning bolt 0 is cutaway in the place where the pin 6 is intended to slide past same. Theturning bolt 0 can be turned from the outsideby means of the key (Z. Theturning bolt 0 can be turned from the inside of the door by means of thelever e. The latter can be fixed in the locking position (Fig. 3) byscrewing up the pointed binding screw f, so that it engages in a holeprovided for the purpose in the lock plate 9 and makes it impossible forthe lever e to turn. The shaft hof the two door handles 2' and 79carries the nut or pinion Z which engages in teeth on the catch bolt a.The spring m has a tendency to press the catch bolt into the lockingposition. The key d may have one or more wards. In the lock plate a(Fig. 4) seated on the outside of the door is an opening 0 for theintroduction of a key with two wards. The openings for the handle shafth are surrounded on both door plates 11. and g by bearing supports 79and g. On a special insertion plate r that carries the pin 8 for the key(Z, a pair of fixing or adjusting devices 6 are fixed by means ofscrews, which can be easily adjusted as desired in their oblong slots u,so that the lock can no longer be locked with the old keys d but onlywith a suitably formed new key. The turning bolt 0 extends through thehole in the inside door-plate and carries on its square end the lockinglever 6 (Figs. 7 and 8) which enables the locking bolt 0 to be turned inthe hole and to be fixed in certain positions by means of the screw f.

That I claim as my invent-ion and desire to secure by Letters Patent, is

In combination with a sliding bolt, a

vertical pin extending upwardly therefrom, In testimony whereof I afiiXmy signature a rotatable bolt disposed transverse to said in presence oftwo witnesses. sliding bolt and formed with a cutaway part which when inone position permits the pin PAUL NITZSGHE' to travel past the rotatablebolt and which Witnesses:

when the bolt is rotated to another position FRITZ- RAMERMANN,

prevents movement of the sliding bolt. KARL VARRELMANN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

